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HVAC-How To Check The Windings Of a 3 Phase Compressor & Check For Any Grounds (A/C & Refrigeration)

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How to troubleshoot a 3 phase compressor using a muli-meter
How to check a compressor for any grounds
How to check the windings of a 3 phase compressor
How to check resistance of a 3 phase compressor
How to ohm out a compressor
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This video shows you how to test a 3 phase compressor for any grounds as well as how to test the windings of a 3 phase compressor using a muti meter.
Checking for a grounded compressor:
From each 1 terminal to ground, you should read "O.L" indicating there is no ground if using resistance and there should be no audible sound if using continuity. If there was an audible sound indicating you have continuity or if you had a resistance reading then that would indicate you have a ground.
Checking the windings of a 3 phase compressor:
Between any 2 terminals in any combination, there should be a balanced reading meaning between any 2 terminals in any combination, you should have the same or very similar reading between the terminals when checking resistance indicating the windings are good. If you didn't have a balanced reading between a set of 2 terminals, that would indicate the compressor has failed internally due to the windings.
Thanks for watching!
Email: Jumpermantech@Gmail.com
Follow me on instagram! @JumpRmantech

Опубликовано:

15 авг 2024

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Комментарии : 73

@3lbs 4 года назад

As a Professional HVAC installer with limited service experience, I find this video easy to follow and understand. Thanks for the video.

@JumpermanTech 3 года назад

Thats awesome! Glad you found this video easy to follow & understand. I appreciate the feedback🙏 Stay safe out there & stay tuned for new videos every week🔧

@jollyscaria1922 Год назад

Vrey good welcomed

@jollyscaria1922 6 месяцев назад

Vrey good trmial good celing testimeinv metar tedtkmg 3trmisls very good groundd no contuvit tedtinv maghet tedtinv good sdhowinv sound comeinv body vomd no ok goos come not good yes righted all3point refing sdhoeinv iz good wdlvome gues yes sirok

@smith6603 6 месяцев назад

Am admiring your videos, they are teach me amazing ways to level up my education.

@Steven-wp6pr 3 месяца назад

I liked the way you were direct and no fluff

@RalphbeingRalph 10 месяцев назад

This helped me a lot furthering my HVAC career

@aliqtr7495 3 года назад

Thanks ,u teach in easy way .GOD bless u

@JumpermanTech 3 года назад

You're welcome & thank you! I appreciate that very much. Stay safe out there & stay tuned for new videos every week🔧

@alexeytech1495 4 года назад

Great video for the technical personal.👍

@JumpermanTech 3 года назад

Thank you very much! Glad you found this video great🙂 Stay safe out there & stay tuned for new videos every week🔧

@rajeshparamunsee6532 Месяц назад

Brilliant stuff

@JacksonAndrews-gn8bk 4 года назад

Save your sandpaper and use that ground wire right on the compressor

@JumpermanTech 3 года назад

Good tip👍 Thanks for watching! Stay safe out there & stay tuned for new videos every week🔧

@chrismuniz8515 3 года назад

Perfect demonstration str8 to point

@izzybell11 4 года назад

Interesting subject and well explained. Thank you for sharing your experience with us. Good job. ⭐️⭐️⭐️⭐️⭐️

@JumpermanTech 3 года назад

You're very welcome & thank you for sharing your feedback with me🙏 Thanks for watching. Stay safe out there & stay tuned for new videos every week🔧

@AlexLopez-rn4ex 3 года назад

On a three phase compressor the windings always read the Same resistance. if the compressor is good.

@johnbrewer1234 3 месяца назад

OL = Over limit. Good concise video sir

@noonej6523 Год назад

The compressor I’m testing right now currently has no resistance but all three of the thermals are giving me a diffrent ohm reading what could be the reasoning for this?

@timcordero8453 3 месяца назад

Excellent content thank you very much

@Sc19869 11 месяцев назад

What is a 3 phase compressor and what is a single phase. Appreciate your knowledge and videos. Also when you mean check the compressor for ground, is that a short?

@DavidBeckett-xz4lh 21 день назад

Are the earth and neutral combined.

@anvibrimel41 2 года назад

Thanks for the teaching,and a have a question what meant is when checking between the Wingdings you get OL on a 3 face compressor,exactly the same like you used to teach. Thanks for the answer y your time

@JumpermanTech 2 года назад

You're very welcome & thank you for watching! OL would mean you have open windings which means you have a bad compressor and it must be replaced. What you are checking is the resistance of the windings to see if they are in tact or not. The best test for this is to use a meter called a megohmmeter and I made a video on how to check all kinds of compressors with that. Stay tuned for new videos every week🔧⚡️

@justinlynn7315 3 года назад

Good video. O.L. is actually Over Limit which means that the value is over the measurable limit. Such as what infinite ohms would be if there is no continuity to ground

@scottshawn70 Год назад

Technically it does not mean “over limit” it means open loop or open line to signify there is no continuity. When checking continuity you are checking if there is a closed path for current.. or if it’s “open”.

@jollyscaria1922 Год назад

Sound ohms showesing good no grunde

@Rubensandoval310 4 года назад

Nice explanation

@JumpermanTech 3 года назад

Thank you very much! Appreciate your feedback🙏 Stay safe out there & stay tuned for new videos every week🔧

@airtechnologygroup1738 3 года назад

Thanks for simple explanation.

@JumpermanTech 3 года назад

You're very welcome & thank you! Appreciate the feedback. Stay safe out there & stay tuned for new videos every week🔧

@Eddy63 10 месяцев назад

Good info Jumper ... Thx

@robbyclark6915 2 года назад

That’s fine but what IF all the windings do NOT read the same resistance? What does that mean? 🤷🏻‍♂️

@syngencase9193 9 месяцев назад

Depends on if it’s 3 phase or single phase in this instance if he got like a 1.9 the windings would be bad

@junior74810 Год назад

Can one of these pumps be converted to single phase? Thank you!

@techfive7202 3 года назад

Dont do much light commercial. Mostly residential. I had an rtu 3 phase carrier today 10ton that the compressor terminal port blew out and leaked all the refrigerant. Tested ohms across and got 5ohms on each leg. Will grounding it out somewhere cause it to blow like that?

@JumpermanTech 3 года назад

You got 5 ohms across one terminal to the other or one terminal to ground? It could def be a possibility. Thanks for watching. Stay safe out there & stay tuned for new videos every week🔧

@techfive7202 3 года назад

@@JumpermanTech all 3 terminals tested 5 ohms on resistance across each other. Nothing to ground. 15 ton rtu

@ishworibdrniroula2150 2 года назад

thank you dear

@Nab-Asn2803 3 года назад

Great vedio jumperman tech

@MegaIsok 3 года назад

Would you check the amp draw on a compressor to get a more in-depth diagnosis of its condition?

@WillieMakeit Год назад

Not if it's shorted. If it works you could check each leg with a megohm meter

@mickeylojkar5769 3 года назад

So if one winding don’t read the same, isn’t the terminology called shunted windings of the compressor?

@sfchannel764 3 года назад

Hello sir, if we want to check winding.. Power suppy need to be on or off?

@nickbarnes9347 3 года назад

Off

@gedyx 10 месяцев назад

Hey buddy what should be expected when starting a 3 phase scroll compressor?

@gedyx 10 месяцев назад

Low pressure differential or high pressure differential?

@lakhpatsingh6412 2 года назад

How to check amps

@zoshimuddin5263 2 года назад

Good xpalandt sir

@CG-qc1ob 2 года назад

I got resistance only on S+R but not resistance on the other ones

@JumpermanTech 2 года назад

So from C-S & C-S you're getting nothing? Are you getting an O.L reading?

@CG-qc1ob 2 года назад

@@JumpermanTech yes getting LO reading

@JumpermanTech 2 года назад

@@CG-qc1ob You may get an OL reading when the compressor is hot and went off on the internal overload. Check again when the compressor is ambient temperature to confirm but it's looking like a bad compressor so it's time to replace it. Thanks for watching!

@JumpermanTech 2 года назад

@@CG-qc1ob Stay tuned for new videos every week!

@CG-qc1ob 2 года назад

@@JumpermanTech Thanks 😊 I just graduated from trade school. At first unit wasn’t getting any power at all, it was the breaker, then bad capacitor, changed capacitor, everything turned on except the compressor. My diagnose was bad compressor . Thanks for your videos and and respond. I hope you have a video how to turn an ecm motor to psc motor using just relay thanks 🙏🏻 again

@babaolowo35 3 года назад

Nice one

@pianduchuance859 2 года назад

Good

@hafizulilmi1476 3 года назад

Is there any case there resistances for all windings but inequal?

@JumpermanTech 3 года назад

For 3 phase compressors, that might indicate you have an issue. To go further in depth, use a megohmmeter to test the compressor. I just made a video on that last.Stay safe out there & stay tuned for new videos every week🔧

@UltraHydrophobiccoat 4 года назад

Why manufacture 3 phase compressors instead of one phase?

@ridered03cr 4 года назад

3 phase is more for commercial. Though you can do 3 phase for your residential home, I just don’t see why you would really need to. It’s also more expensive. 3 phase compressors draw a lot less current than single phase. So you can achieve the same tonnage with less power. They have much more starting torque as well, meaning you don’t need to run a capacitor or a start capacitor for the compressor to run. They also last longer too. Hope this helps.

@justinwallace390 3 года назад

@@ridered03cr Thank you for that info

@qarayen1725 4 года назад

Is it possible to test the running using single phase and a capacitor ?

@JumpermanTech 3 года назад

What do you mean exactly by that?

@TinKnocker69 4 года назад

Noobie here. What would a ground mean? Why don't you want any grounding?

@nickschmid2273 4 года назад

If the electricity has a direct path to ground at this location where the plug is, the electricity will take the path of least resistance and go to ground, instead of through the load. When electricity has no resistance like that, and goes straight from the power source to ground, it will flow very rapidly and cause whatever it is flowing through to heat up very quickly. A circuit breaker or fuse will pop when this sudden rush of current goes through them.

@TinKnocker69 4 года назад

@@nickschmid2273 Thank you!

@Sc19869 11 месяцев назад

@@nickschmid2273can you give examples of what a path to ground would be? And is grounding considered a short. Thank you

@wd8557 3 года назад

Next time use a megger and check the insulation.

@JumpermanTech 3 года назад

Great tip👍 Just made a video on that! Appreciate the feedback. Stay safe out there & stay tuned for new videos every week🔧

@jabroski69 Год назад

Comment

@harryschrysan3183 Год назад

I have a question. Today I was diagnosing a compressor for a mini split that was making weird noises and after 3-4 seconds it stops on thermal overload. I took the resistance on the 3 terminals and all were the same resistance. But when I was checking each to ground I had continuity. I was buffled because I know a grounded comp trips the breaker but this one would trip the overload plus it would try to start for a few seconds. I read the diagram and it seems to be a star winding configuration. My boss told me that those comps are by default grounded. It's the first time I have seen this. Is it for real? I am questioning my boss's knowledge atm 😅